Uncle Zhang, Uncle Li and Uncle Wang share a house with three bedrooms and one living room. Details are as follows.

1200/(30+20+20) =15 yuan/Ping.

Uncle Zhang: 30* 15=450

Uncle Wang: 25* 15=375

Uncle Li: 25* 15=375

Since it is shared, it can be shared equally, which is the same area and has nothing to do with the permanent population!

I hope you are satisfied.